/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-hover: #059669;
      --accent-orange: #F97316;
      --bg-slate: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-light: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: #F8FAFC;
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.7;
    }
    .hero-split-card {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .hero-split-card:hover {
      transform: translateY(-4px);
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 9999px;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-content.open {
      max-height: 400px;
    }